Procedure for controlling continuous variable transmissions in m

Details Procedure for controlling continuous variable transmissions in m Procedure for controlling continuous variable transmissions in m

1997-01-08

1999-05-25

Louis-Jacques, Jacques H.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 58, 701 61, 477 46, 477 49, 474 18, G06G 770

Patent

active

059066490

ABSTRACT:
A continuously variable transmission in a motor vehicle is regulated using a controller comprising a first control circuit as a speed controller for regulating the transmission input speed as the product calculated from the transmission output speed and the transmission ratio, complete with a summation element at the controller input as well as with a control element, and a second control circuit post-connected to the first control circuit as a speed gradient controller for regulating the time derivative of the transmission input speed, complete with a summation element at the controller input. To preset a variable control response of the controller, different filter functions are defined, in relation to the operating conditions of the motor vehicle, as a fixed relationship between the input quantity control deviation as the difference calculated from nominal and actual values of the transmission input speed and the output quantity nominal gradient value of the transmission input speed, and fed to the control element of the first control circuit, which control element has been designed as a filter element. Depending on the current operating conditions of the motor vehicle, and using of the predefined filter functions, the filter element generates a filter function used as a current filter function. The function values of the current filter function are fed as filter values and as a reference magnitude from the filter element to the summation element at the controller input of the second control circuit.

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patent: 5707313 (1998-01-01), Suzuki

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